一束追不上的光，为什么改变了时间和空间？

为什么无论你飞得多快，都永远追不上一束光？ 真空中的光速对所有惯性观察者都相同。就是这条看似简单的规律，最终迫使物理学重新理解时间、空间，甚至什么叫“同时”。 这期节目，我们从光的本质、麦克斯韦和以太实验讲起，一路走进狭义相对论、时间膨胀、长度收缩、因果极限和量子世界，看看每秒299792458米这个数字背后，究竟隐藏着怎样的宇宙规则。 00:00 为什么你永远追不上光？ 02:30 光到底是什么？ 04:32 从“以太”到麦克斯韦 06:33 光速与经典物理的冲突 09:03 爱因斯坦重新定义时间和空间 10:03 时间膨胀与长度收缩 12:26 “同时”为什么不是绝对的？ 14:04 接近光速时，你会看到什么？ 16:14 光速为什么是宇宙的极限？ 18:20 光的另一面：量子世界 20:54 总结：一束光如何改变时空 PIXABAY LICENSE CERTIFICATE ============================================== This document confirms the download of an audio file pursuant to the Content License as defined in the Pixabay Terms of Service available at https://pixabay.com/service/terms/ Licensor's Username: https://pixabay.com/users/arctsound-2... Licensee: TMH10000 Audio File Title: Epic Trailer No Copyright Music Audio File URL: https://pixabay.com/music/build-up-sc... Audio File ID: 121089 Date of download: 2026-04-28 19:27:24 UTC Pixabay, a Canva Germany GmbH brand Pappelallee 78/79 10437 Berlin Germany Pixabay is a user-contributed stock content website. The above-named Licensor is responsible for this audio file. Pixabay monitors uploaded audio files only to a reasonable extent. Pixabay cannot be held responsible for the acts or omissions of its users and does not represent or warrant that any required third-party consents or licenses have been obtained. For any queries related to this document please contact Pixabay via info@pixabay.com. ==== THIS IS NOT A TAX RECEIPT OR INVOICE ====